We awoke this morning to a very chilly apartment. Worried that our inner thermostats had simply turned soft from the summer weather, we checked the temperature online and it was in the low 30's! And yes, guiltily, we turned on our heat (GASP!) for a couple hours. So when we saw Boston.com's The Green Blog pose the same question that's been on our mind a lot in the past week, we thought we'd throw it out to the AT community as well...

If you're someone who pushes it to the outermost limit of when to turn the heat on, what tactics do you use to stay warm?